So is TFO the Army’s CIA or not?

In other words, the question of the title is basically, what exactly does TFO do?

First off, yes, I’m aware it‘s insanely classified and probably the least talked about unit, so information is scarce. However, wherever there is conversation, no one ever seems to give a concrete answer.

Here’s what I know. TFO is a unit in the Army that sends out dudes far across the world to get intelligence. These guys will often wear civilian clothes, have a civilian appearance, live like a regular citizen of that nation, and gather “Human Intelligence”. A big majority of them are former SF, so they already have a basis in unconventional foreign affairs.

But what does that mean in ELI5 terms? What is “Human Intelligence”? And is it analogous to “The Army’s CIA”?